CODEWITHSUNDEEP
pythonpython-2.7numpyterminal
sandeep p
sandeep p

Reputation: 121

numpy does not work through terminal

dI have installe numpy on ubuntu by executing

sudo apt-get install python-numpy

while executing on terminal I get this error.

>>> import numpy as np
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named numpy
>>>

why this is happening? I tried many a times by going through internet but I couldnt find a solution.Could you please tell me how to solve this?

Edit1: I came to know that I have to install numpy for the python version which I run on terminal, using pip.. Python 2.7.3 runs when I enter 'python' on terminal. So that means I have to install numpy for python 2.7.3. Can someone guide me how to do it? I couldnt figure it out by myself. BTW I am using Ubuntu 12.04 if that helps.

Edit 2: I did some more digging into this.. my /usr/lib contains two directories python2.7 and python3.While Python2.7 directory consists of a large number of files and sub directories,python3 directory has only dist-packages subdirectory which consists of deb_conf.py anf lsb_release.py..I think I tried python3 few months back and then removed it..But right now python2.7 is the only thing i am having.

Edit 3:

SO here are the outputs of the commands you asked me to enter

~$ virtualenv --no-site-package -p /usr/bin/python2.7 my_env
Running virtualenv with interpreter /usr/bin/python2.7
The --no-site-packages flag is deprecated; it is now the default behavior.
New python executable in my_env/bin/python2.7
Not overwriting existing python script my_env/bin/python (you must use my_env/bin/python2.7)
Installing  distribute..............................................................................................................................................................................................done.
~$ source my_env/bin/activate
~$ pip install numpy

last command gave a generated a lot of logs which ended with something like this..

Creating build/scripts.linux-i686-2.7/f2py2.7
  adding 'build/scripts.linux-i686-2.7/f2py2.7' to scripts
changing mode of build/scripts.linux-i686-2.7/f2py2.7 from 664 to 775

changing mode of /home/sandeep/my_env/bin/f2py2.7 to 775
Successfully installed numpy
Cleaning up...

After all these I tried to run python again and this is the output.

~$ python
Python 2.7.3 (default, Jan 20 2013, 21:40:19) 
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy as np
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named numpy
>>>

Upvotes: 1

Views: 4330

Answers (1)

Lo&#239;c Faure-Lacroix
Lo&#239;c Faure-Lacroix

Reputation: 13600

In case nothing works.

  1. Install python-virtualenv if it's not yet done.

  2. Create a virtual env

    virtualenv name

  3. Start the virtualenv

    source name/bin/activate

  4. Install numpy with easy_install or pip

  5. Profit

Note:

Virtualenv activation has to be done everytime. But you can make that task easier with virtualenv wrapper.

http://virtualenvwrapper.readthedocs.org/en/latest/

There are a lot of reasons to use virtualenv instead of ubuntu packages. In some way, I recommend not touching as much as possible the "OS" python. And if you need it for a project, use virtualenv. Python in virtualenv won't mess with other apps and you don't have to use sudo to install new packages.

Upvotes: 3

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